System and method for cooling of an exhaust gas recirculation unit
Inactive Publication Date: 2014-11-20
CATERPILLAR INC
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The design of this heat exchanger improves the distribution of heat at the beginning of the EGR unit, reducing the risk of damage to the heat exchanger. It achieves this by creating a uniform coolant flow across the upstream face, which results in reduced peaks of temperature. This design also reduces stress on the individual coolant channels, increasing the life of the heat exchanger during operation.
Problems solved by technology
This high thermal stress may lead to premature failure of the EGR cooler.
However, the '023 publication does not address concerns with EGR cooler failure due to high thermal loads at an inlet face thereof.
Method used
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[0013]Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or the like parts. FIG. 1 illustrates an exemplary machine 100, according to one embodiment of the present disclosure. The machine 100 illustrated in the accompanying figures is a dump truck. It should be noted that the machine 100 may be any “over-the-road” vehicle such as a truck used in transportation. Further, the machine 100 may embody any other type of machine 100 that performs an operation associated with an industry such as mining, construction, farming, transportation, or any other industry known in the art. For example, the machine 100 may be an off-highway truck, an earth-moving machine, such as a wheel loader, an excavator, a dump truck, a backhoe, a motor grader, a material handler, marine equipment, or the like. In one embodiment, the term “machine” used herein may be used to refer to stationary equipment, like a generator, that may be driven by an engine to ge...
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A heat exchanger for an exhaust gas recirculation unit is provided. A tube core of the heat exchanger includes a plurality of coolant channels disposed between a plurality of exhaust gas tubes extending from an upstream face to a downstream face. A coolant inlet line and a first coolant outlet line is disposed in a first quarter section of the tube core defined between the upstream face and one fourth of a length of the tube core adjacent to the upstream face. The first coolant outlet line is configured to draw at least a portion of a coolant flow across the upstream face and into the first coolant outlet line. Further, a second coolant outlet line is provided and is configured to discharge a remaining portion of the coolant flow from the plurality of coolant channels that was not drawn out of the first coolant outlet line.
Description
TECHNICAL FIELD[0001]The present disclosure relates to an exhaust gas recirculation unit, and more particularly to a system and method for cooling the exhaust gas recirculation unit.BACKGROUND[0002]An exhaust gas recirculation (EGR) cooler is a component associated with an engine which is generally installed in order to meet emission level requirements. In some applications, the EGR cooler may be subjected to high thermal cycle stress, specifically at an exhaust inlet face of the EGR cooler which may be brought in contact with a heated exhaust gas flow received from an exhaust manifold of the engine. This high thermal stress may lead to premature failure of the EGR cooler.[0003]Several EGR cooler designs are known in the art. For example, U.S. Publication No. 2010 / 0025023 (hereinafter “the '023 publication) discloses a three-chambered EGR cooler accommodating an EGR flow, a first coolant flow and a second coolant flow isolated from the first coolant flow. However, the '023 publicati...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F02M25/07
CPCF02M25/0737F02M26/32
Inventor SUNDARARAJ, VIVEKSCHURICHT, SCOTT R.AKERS, DAVID ALLEN
Owner CATERPILLAR INC